Preventing eclipse from deleting files in web folders deployed under tomcat when sync

We are using Eclipse to develop web projects. I have Tomcat server defined in the Servers pane. Inside there are two web modules deployed:

Tomcat:

* Module1

* Module2

After initial sync I place files inside the module folders manually. For example: C:\Tomcat\webapps\Module1\Main.swf

It seems when making changes and Eclipse resyncs Main.swf is deleted from the folder.

Is there a way to prevent 开发者_开发百科this?